Pinpoint Test A: The Power Seat Is Inoperative - Driver, With Power Recliner
Seats
Pinpoint Tests
Pinpoint Test A: The Power Seat is Inoperative - Driver, With Power Recliner
Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information. Diagrams By Number
Normal Operation
The driver seat control switch is powered by battery voltage to the driver seat control switch, circuit CBX05 (VT/RD), and is supplied ground on driver circuit GD904 (BK/BU). When pressed, the seat control switch supplies voltage and ground to a power seat track motor or power recliner motor to move the seat or backrest to the desired position. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). There is an additional motor in the power recliner mechanism to move the seat backrest forward and rearward. If a new motor needs to be installed, it is necessary to install an entire power seat track or power recliner mechanism.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Seat control switch
PINPOINT TEST A: THE POWER SEAT IS INOPERATIVE - DRIVER, WITH POWER RECLINER
NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition switch is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
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A1 CHECK THE DRIVER SEAT CONTROL SWITCH FOR VOLTAGE
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C3138.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3065.
- Disconnect: Driver Seat Control Switch C369.
- WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
- Connect the battery ground cable.
- Measure the voltage between driver seat control switch C369-5, circuit CBX05 (VT/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to A2.
No
VERIFY Battery Junction Box (BJB) fuse 32 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify possible causes of the circuit short. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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A2 CHECK DRIVER SEAT CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN
- Measure the resistance between driver seat control switch C369-3, circuit GD904 (BK/BU), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new driver seat control switch. REFER to Seat Control Switch - Front Seat Control Switch - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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